All categories

3 years ago

How many ways can 7 books be arranged on a shelf 5 at a time?

Mathematics

1 answer:

aliya0001 [1]3 years ago

5 0

Symbolically, write this:

C
7 5. Know how to evaluate that?

C stands for "combination."

You might be interested in

Pls help ill give brainliest

Mashcka [7]

Answer:

19 hours

Step-by-step explanation:

2.83333/.3= 19.44

5 0

3 years ago

Divide 2,756 into 1,375,244

alexgriva [62]

Answer:

499

Step-by-step explanation:

you take 1,375,244/2,756=499

3 0

3 years ago

Read 2 more answers

A scientist has discovered an organism that replicates at a rate of five per hour and lives for one week. Each replicated organi

Assoli18 [71]

At hour one, there is 1 organism. At hour two, there is five more organism. At hour three. there will be 6 x 5 = 30 more organisms, etc

This is a geometric sequence with a = 1 (i.e. number of organisms at hour one), r = 5 (number of reprications per hour).

The total number of organisms at hour seven is the sum of the first seven terms of the sequence given by a(r^n - 1)/(r - 1) = 1(5^7 - 1)/(5 - 1) = (78125 - 1)/4 = 78124/4 = 19,531

4 0

3 years ago

What is the solution to the equation below ?

irina [24]

7/8(x-1/2)= -49/80

Multiply the bracket by 7/8

7/8x-7/16= -49/80

Move -7/16 to other side. Sign changes from -7/16 to +7/16

7/8x-7/16+7/16= -49/80+7/16

7/8x= -49/80+7/16

Find common denominator for 7/16 which is 5. Multiply 5 for the numerator and denominator.

7(5) / 16 (5)

= 35/80

7/8x= -49/80+35/80

7/8x= -14/80

Reduce -14/80 , divide by 2

(-14) /2=7 , 80/2= 40

-14/80= -7/40

7/8x= -7/40

Multiply by 8/7

7/8x*8/7= -7/40 * 8/7

Cross out 7 and 7 , and divide by 7. Cross out -7 and 7 and divide by 7. Cross out 40 and 8 divide by 8.

x= -1/5

Answer: x= -1/5 - G.

3 0

3 years ago

One of the products produced by Branco Food Company is All-Bran Cereal, which competes with three other brands of similar all-br

Ksju [112]

The question is incomplete. The complete question is :

One of the products produced by Branco Food Company is All-Bran Cereal, which competes with three other brands of similar all-bran cereals. The company's research office wants to investigate if the percentage of people who consume all-bran cereal is the same for each of these four brands. Let us denote the four brands of cereal by A B C and D. A sample of 900 persons who consume all-bran cereal was taken, and they were asked which brand they most often consume. Of the respondents, 201 said they usually consume Brand A, 224 consume Brand B, 299 consume Brand C, and 176 consume Brand D. Does the sample provide enough evidence to reject the null hypothesis that the percentage of people who consume all-bran cereal is the same for all four brands? Use alpha = 0.025. Find the value of the test statistic x^2. x^2 = the tolerance is +/-2% Using alpha = 0.025, can you conclude that the current percentage distribution is different from the hypothesized one? We conclude that the current percentage distribution from the hypothesized one.

Solution :

A B C D Total

$o_i$ 201 224 299 176 900